Update git submodules

* Update docs/submodules/armband from branch 'stable/euphrates'
  - u/fuel: Bump for maas state online nodes check

    Change-Id: I22f572fe3067e15f1ca91481fe60fef5329ee48a
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit b7d537303fa171c642025f5c53ed381fd6cb7c3d)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 9ab869c..a8ba1fa 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 9ab869c0eb50fde3d8ccdf20bdd86c68995f59db
+Subproject commit a8ba1facc345bc6af997671933a7efc40a715608